I made one last year with some scraps of wood left over from my mame machine.
At the moment its on the bar of my local in Malta where it gives endless entertainment.
You put a "do not touch" sign next to it and watch what happens. You would be surprised how many people are either hard of reading or just cant resist pressing something which has do not press written on it.
We have a gallery of very surprised and/or guilty looking people taken from the web cam :)
I bought myself
1) a simple fan on batteries : ? 0,50
(with an extra batterie it runs faster and could do the job.)
2) a nice wooden box to built it in ? 2,00
I develloped a scheme to make it work with just some simple wheels and bars on the inside.
I rebuilt the motor with gearing.
I bought some cogwheels.
The motor can now lift 243x more weight than before.
The motor makes 243 turns against 1 turn on the moving axis.
Now I am gonna make the armmove quite different then before.
The arm made a quarter move up and then also backwards.
In the new machine I will try to add some weight to the arm.
The arm will be lifted by the motor and will switch off.
The machine however will have another switch that goes on the moment the arm rises. The arm will rise only over a 1/3 cogwheel (2/3 removed).
After almost 1/3 the switch is turned. When there are no more gears on the wheel, gravity will pull the arm back in. The switch turns off, the motor stops.
Why not have the toggle switch reverse the polarity to the motor to that it causes the arm it to go back when the arm knocks it. Then when the arm is at rest there is a micro switch to stop the reverse current, but not the normal plolarity. That way when you toggle the switch the motor will spin and the arm will come back out to reverse the polarity again then rest.
Why not have the toggle switch reverse the polarity to the motor to that it causes the arm it to go back when the arm knocks it. Then when the arm is at rest there is a micro switch to stop the reverse current, but not the normal plolarity. That way when you toggle the switch the motor will spin and the arm will come back out to reverse the polarity again then rest.
I thought the motor couldn't switch direction, but it can!
Why not have the toggle switch reverse the polarity to the motor to that it causes the arm it to go back when the arm knocks it. Then when the arm is at rest there is a micro switch to stop the reverse current, but not the normal plolarity. That way when you toggle the switch the motor will spin and the arm will come back out to reverse the polarity again then rest.
It will become like this:
I have a switch with 6 connectors. So 2x on/off.
First is used to connect power on/off
Second is used to set polarity to move up.
When the arm goes up a microswitch in the box will set power on too.
The arm set the switch back anf turns polarity and power off.
However the microswitch in the box is still set and turned off when the arm rest on it. So polarity is handled by the switch on top.
Power on/off inside and on top to start the first move.
Comments
I prefer this one:
BANANA FAN!
http://www.youtube.com/watch?v=QFVratN53wc&NR=1&feature=fvwp
Endless Grass
Do you have the schematics? Can I get a copy also, pwease!
EDIT:
Found it!
- IONIAN-GAMES.com -
At the moment its on the bar of my local in Malta where it gives endless entertainment.
You put a "do not touch" sign next to it and watch what happens. You would be surprised how many people are either hard of reading or just cant resist pressing something which has do not press written on it.
We have a gallery of very surprised and/or guilty looking people taken from the web cam :)
useless machine, turns itself off...sounds like most of our machines at work Oo
I had the idea to make it the clockwork version.
Saves motor and batteries.
1) a simple fan on batteries : ? 0,50
(with an extra batterie it runs faster and could do the job.)
2) a nice wooden box to built it in ? 2,00
I develloped a scheme to make it work with just some simple wheels and bars on the inside.
Now it's time to built a prototype.
I need 2 switches. 1 on top 1 in the box to switch off the power when arm goes in.
Motor is quite weak (it can't lift the boxlit, so I hide it behind a piece of cloth), but it will do the job when ready.
I bought some cogwheels.
The motor can now lift 243x more weight than before.
The motor makes 243 turns against 1 turn on the moving axis.
Now I am gonna make the armmove quite different then before.
The arm made a quarter move up and then also backwards.
In the new machine I will try to add some weight to the arm.
The arm will be lifted by the motor and will switch off.
The machine however will have another switch that goes on the moment the arm rises. The arm will rise only over a 1/3 cogwheel (2/3 removed).
After almost 1/3 the switch is turned. When there are no more gears on the wheel, gravity will pull the arm back in. The switch turns off, the motor stops.
I thought the motor couldn't switch direction, but it can!
It will become like this:
I have a switch with 6 connectors. So 2x on/off.
First is used to connect power on/off
Second is used to set polarity to move up.
When the arm goes up a microswitch in the box will set power on too.
The arm set the switch back anf turns polarity and power off.
However the microswitch in the box is still set and turned off when the arm rest on it. So polarity is handled by the switch on top.
Power on/off inside and on top to start the first move.